"This latest report is alarming, but it must not be used as an excuse by Washington hard-liners to launch another war. There are no good military options. The United States and the other major powers — Russia, China, Britain, France and Germany — have yet to put together a serious package of incentives and sanctions that might persuade Iran to change course. That must include a credible American offer of security guarantees and normalized relations if Tehran abandons any nuclear weapons ambitions."